[go: up one dir, main page]

CN112356176A - Plywood with formaldehyde room-temperature catalytic decomposition function and preparation method thereof - Google Patents

Plywood with formaldehyde room-temperature catalytic decomposition function and preparation method thereof Download PDF

Info

Publication number
CN112356176A
CN112356176A CN202011224093.8A CN202011224093A CN112356176A CN 112356176 A CN112356176 A CN 112356176A CN 202011224093 A CN202011224093 A CN 202011224093A CN 112356176 A CN112356176 A CN 112356176A
Authority
CN
China
Prior art keywords
plywood
catalyst
formaldehyde
coating
catalytic decomposition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011224093.8A
Other languages
Chinese (zh)
Inventor
徐宏图
袁高松
石海亮
魏童童
李力成
圣倩倩
祝遵凌
周超
王海波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Guohao Environmental Protection Material Technology Co ltd
Nanjing Forestry University
Original Assignee
Nanjing Guohao Environmental Protection Material Technology Co ltd
Nanjing Forestry University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Guohao Environmental Protection Material Technology Co ltd, Nanjing Forestry University filed Critical Nanjing Guohao Environmental Protection Material Technology Co ltd
Priority to CN202011224093.8A priority Critical patent/CN112356176A/en
Publication of CN112356176A publication Critical patent/CN112356176A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G11/00—Applying adhesives or glue to surfaces of wood to be joined

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

The invention discloses a plywood with a formaldehyde room temperature catalytic decomposition function and a preparation method thereof. The functional coating endows the plywood with conventional surface performance, the adopted supported noble metal catalyst can efficiently decompose formaldehyde at room temperature without illumination, and the varnish is used as the coating, so that the catalyst particles can be firmly fixed on the surface of the plywood while the performance and the attractiveness of the surface of the plywood are improved. The plywood can be used for manufacturing furniture, landscape walls and the like, effectively controls the formaldehyde concentration in indoor space, and improves the indoor environment air quality.

Description

Plywood with formaldehyde room-temperature catalytic decomposition function and preparation method thereof
Technical Field
The invention relates to the technical field of air purification, in particular to a plywood with a formaldehyde room-temperature catalytic decomposition function and a preparation method thereof.
Background
Formaldehyde is one of the most typical and most harmful gas pollutants in indoor environment, and causes adverse stimulation, respiratory diseases and even canceration when a human body is in an environment with excessive formaldehyde for a long time. The indoor formaldehyde is mainly from artificial boards adopted by decorative materials such as furniture and the like, and the artificial boards need to use a large amount of urea-formaldehyde resin in the manufacturing process, and due to instability, the artificial boards can be slowly decomposed into formaldehyde to be released into air, so that the air quality is seriously influenced. The plywood is one of three artificial boards, is formed by gluing and hot-pressing three or more layers of single boards or thin boards with the thickness of one millimeter, has light weight, clear lines and high strength, is not easy to deform, has good mechanical property, is widely used as furniture manufacturing, interior decoration and residential building materials, and is the main reason for exceeding the standard of indoor formaldehyde in large-scale use.
At present, the conventional methods for removing the indoor formaldehyde comprise a green planting method, an adsorption method of porous substances such as activated carbon and the like, a chemical reaction method and a catalytic oxidation method. The catalytic oxidation method has the advantages of high purification efficiency, no secondary pollution, high repeated utilization rate and the like, and thus the catalytic oxidation method has wide attention. The existing catalytic oxidation technology is applied to the field of removing indoor formaldehyde, wherein TiO is mainly adopted2The nanoparticles or the photocatalyst decompose formaldehyde, but the process requires ultraviolet irradiation as a necessary condition for activating the catalyst; in thatThe use of this technology would be challenging when there is no sunlight indoors, on cloudy days, or at night. In contrast, the supported noble metal catalyst can spontaneously decompose the formaldehyde into harmless water and carbon dioxide at room temperature without illumination, has lasting long-acting performance, meets the characteristic requirement of long-term release of the formaldehyde in the plate, and has good application prospect. However, in the current technology, the supported noble metal catalyst is mainly loaded in the air purifier for use, but the device is electrified for a long time to operate, so that the use cost is high, and the device occupies a certain space indoors, thereby causing the difficulty in wide popularization of the technology. Thus, the ideal use case is: the current indoor commonly used devices are combined with the catalyst, and the function of efficiently decomposing indoor formaldehyde is added without purchasing new devices.
The coating method is a common method for loading a catalyst on the surface of an object, and a catalyst is mixed with sol, an auxiliary agent and the like to prepare a catalyst coating which is combined with a shutter to prepare a composite shutter for room-temperature catalysis. And mixing the catalyst with water-based resin, film-forming assistant and other substances to prepare the formaldehyde-removing water-based glass coating, so as to realize the combination of the catalyst and indoor devices. However, the coating preparation method can coat the catalyst on the surface of the carrier after stirring the catalyst and other substances, so that the catalyst is covered by other substances, and the original excellent catalytic effect of the catalyst is greatly reduced. In addition, the plywood which is the main releasing source of indoor formaldehyde can still cause harm to human bodies in the diffusion process even though the released formaldehyde is decomposed by catalysts on the surfaces of other indoor devices.
The invention content is as follows:
in view of the above requirements, the present invention aims to provide a formaldehyde catalytic decomposition functional coating based on plywood and a preparation method thereof. The plywood is used as a carrier, and the coating preparation method of firstly coating varnish and then spraying the catalyst is adopted, so that the catalyst particles are uniformly and firmly dispersed on the surface of the varnish, and the problem of catalyst coverage caused by the preparation of the coating by a blending method is avoided. The varnish is used as a substance for connecting the catalyst and the plywood, so that the mechanical property of the surface of the plywood can be improved while the solid support is realizedQuality and aesthetic. In practical application, formaldehyde released by the plywood can be captured by the catalytic layer on the surface for the first time and spontaneously decomposed into CO at room temperature2And H2O, thereby preventing it from diffusing into the air to damage human health. In addition, the plywood prepared by the method can be made into indoor devices occupying large indoor space, such as furniture, background walls and the like, so that the contact area between the surface catalyst and formaldehyde gas can be increased, and on the other hand, the furniture and the like are common indoor devices, and formaldehyde can be efficiently decomposed without adding new devices.
The object of the invention can be achieved by the following measures:
the utility model provides a plywood with formaldehyde room temperature catalytic decomposition function which characterized in that: the catalyst consists of two parts, namely a noble metal active component and a catalyst carrier, wherein the loading amount of the active component is 0.5-6 wt%.
The plywood is one of sand light plywood, scraping plywood, wainscot plywood, veneer plywood in advance, the plywood material is one of basswood, birch, poplar, elm.
The adhesive layer is one or more of ester glue varnish, shellac varnish, alkyd varnish, polyester ester glue varnish and anticorrosive wood oil, the adhesive force of the adhesive layer is grade 1, and the drying time is 2-12 h.
Here, the drying means that the adhesive layer complies with the regulations in GB1727-92 regarding drying.
The active component of the catalyst is one or a mixture of more than two of Pd, Pt and Au.
The carrier of the catalyst is SiO2、TiO2、Al2O3One or a mixture of two or more of them.
The preparation method of the plywood with the formaldehyde room-temperature catalytic decomposition function is characterized by comprising the following preparation steps:
(1) putting the catalyst powder into a ball mill, adding a certain amount of solvent and auxiliary agent, wherein the rotating speed of the ball mill is 100-1000r/min, and the ball milling time is 2-12h to prepare the catalyst coating;
(2) the adhesive layer is coated on the surface of the plywood carrier by a coating brush, and can be repeatedly coated, and the coating amount is 50-100mL/m2Then drying for 5-20min at 30 ℃;
(3) spraying the catalyst coating onto the adhesive layer with a spray gun with a diameter of 0.2-2mm, and air pump as air pressure source with air pressure of 0.2-1Mpa and spraying amount of 50-200mL/m2Then drying for 6-12h at 30 ℃;
the solvent is one or a mixture of more than two of water, ethanol and toluene;
the auxiliary agent is one or a mixture of more than two of sodium hexametaphosphate, oleic acid and polyvinylpyrrolidone.
The mass ratio of the catalyst, the auxiliary agent and the solvent in the catalyst coating is 2-10: 1-5: 85-97.
The specific implementation mode is as follows:
in order to make the technical solution of the present invention clearer, the technical solution of the present invention will be further described below with reference to some specific examples. The examples are described to further illustrate the invention and should not be construed as limiting the scope of the invention.
Example 1:
preparation of 1% Pt/TiO by impregnation method2The specific method of the catalyst is as follows: according to Pt with TiO2The mass ratio of the chloroplatinic acid solution to the anatase TiO is 1:1002Mixing and stirring for 30min, drying for 6h under natural condition, drying for 12h at 110 ℃, roasting for 2h at 400 ℃, and reducing by using sodium borohydride to finally obtain 1% Pt/TiO2A catalyst. Mixing 4 parts of the obtained catalyst, 2 parts of sodium hexametaphosphate and 94 parts of quantitative deionized water, and putting the mixture into a planetary ball mill to perform ball milling for 6 hours at a speed of 500r/min to prepare the catalyst coating. Coating ester glue varnish with adhesive force of grade 1 and drying time of 12h on the surface of the sanded plywood made of basswood by a coating method, wherein the coating amount is 50ml/m2And then dried at 30 ℃ for 20 min. The catalyst prepared by the method is sprayed by a spray gunSpraying agent coating onto the bonding layer with a spray gun diameter of 0.2mm, air pump as air pressure source, air pressure of 0.2Mpa, and spraying amount of 200ml/m2And then drying for 6h at 30 ℃ to obtain the formaldehyde catalytic decomposition coating based on the plywood.
The performance evaluation of the catalytic cork plate is carried out in a self-made formaldehyde static evaluation device which consists of a bubbling device, a quartz glass box, a fan, a formaldehyde detector and a glass vessel. Wherein quartz glass case volume is about 9L, and a culture dish is placed to the bottom and is used for placing the catalysis cork board, and upper portion has a sealed lid that can freely regulate and control height, can seal the culture dish in formaldehyde concentration stable stage, for avoiding quartz glass to the absorption of formaldehyde, pastes a layer of paper tinsel in quartz glass inside. The bubbling device can quantitatively bubble out formaldehyde gas to enter the quartz glass chamber; a fan inside the quartz glass box can promote the air flow in the cavity; the formaldehyde detector is American Interscan4160, and can quickly and accurately measure the concentration of formaldehyde in the pipeline. The specific testing steps are as follows: first, a 20cm by 20cm square plywood was placed in a glass dish and sealed with a sealing lid. Then, a formaldehyde bubbling device is adopted to bubble formaldehyde gas into the quartz glass chamber, the temperature of the formaldehyde solution is controlled to be 4 ℃ by using a circulating water pump, and high-purity oxygen is used for bubbling, wherein the gas speed is 10 ml/min. At the moment, a formaldehyde detector is adopted to read the gas concentration in the circulating pipeline in real time until the concentration reaches about 10ppm (marked as C)0) Stopping blowing, lifting the sealing cover, allowing the catalytic cork plate to contact and react with formaldehyde gas, and recording the concentration (marked as C) of formaldehyde in the pipeline in real time through reading of a formaldehyde detector. Real-time formaldehyde conversion rate (C) of catalytic cork board0-C)/C0*％。
It was determined that the formaldehyde conversion was 66.97% when the reaction was carried out for 12h, and that the formaldehyde had completely decomposed at 20 h.
Example 2:
Pd/TiO with 2 percent Pd loading capacity prepared by adopting an impregnation method2The specific method of the catalyst is as follows: according to Pd and TiO2The mass ratio of the palladium chloride solution to the anatase TiO is 2:1002Mixing, stirring for 30min, and naturally drying for 6 hrDrying at 110 deg.C for 12h, calcining at 400 deg.C for 2h, and reducing with sodium borohydride to obtain 2% Pd/TiO2A catalyst. Mixing 4 parts of the obtained catalyst, 1 part of oleic acid and 95 parts of ethanol, and then putting the mixture into a planetary ball mill to perform ball milling for 6 hours at a speed of 500r/min to prepare the catalyst coating. Coating shellac varnish with adhesive force of grade 1 and drying time of 2h on the surface of the scratch plywood made of poplar material by a coating method, wherein the coating amount is 100ml/m2And then dried at 30 ℃ for 5 min. Spraying the prepared catalyst coating onto the bonding layer by a spray gun with the caliber of 0.5mm, using an air pump as an air pressure source, the air pressure being 0.2Mpa, and the spraying amount being 100ml/m2And then drying for 6h at 30 ℃ to obtain the formaldehyde catalytic decomposition coating based on the plywood.
Through detection, the formaldehyde conversion rate of the plywood in the embodiment can reach 59.35% in 12 hours, and formaldehyde in the reactor can be completely decomposed in 21 hours.
Example 3:
preparation of Pt/SiO with 3% Pt loading capacity by adopting impregnation method2The specific method of the catalyst is as follows: according to Pt and SiO2The mass ratio of the chloroplatinic acid solution to the SiO is 3:100, and the quantitative chloroplatinic acid solution and the SiO are mixed2Mixing and stirring for 30min, drying for 6h under natural condition, drying for 12h at 110 ℃, roasting for 2h at 400 ℃, and reducing by using sodium borohydride to finally obtain 3% Pt/SiO2A catalyst. And mixing 3 parts of the obtained catalyst, 2 parts of polyvinylpyrrolidone and 95 parts of toluene solution, and putting the mixture into a planetary ball mill to perform ball milling for 12 hours at a speed of 200r/min to prepare the catalyst coating. Coating alkyd varnish with adhesive force of grade 1 and drying time of 4h on the surface of elm veneer by a coating method, wherein the coating amount is 80ml/m2And then dried at 30 ℃ for 10 min. Spraying the prepared catalyst coating onto the bonding layer by a spray gun with the caliber of 0.2mm, using an air pump as an air pressure source, the air pressure being 0.5Mpa, and the spraying amount being 150ml/m2And then drying at 30 ℃ for 10h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
Through detection, the formaldehyde conversion rate of the plywood in the embodiment is 25.86% in 2 hours, 62.38% in 5 hours and complete decomposition of formaldehyde in the reactor can be realized in 12 hours.
Example 4:
Au/Al with 4% Au loading capacity is prepared by adopting an immersion method2O3The specific method of the catalyst is as follows: according to Au and Al2O3The mass ratio of the chloroauric acid solution to the Al is 4:1002O3Mixing and stirring for 30min, drying for 6h under natural conditions, drying for 12h at 110 ℃, roasting for 2h at 400 ℃, and reducing by using sodium borohydride to finally obtain 4% Au/Al2O3A catalyst. Mixing 5 parts of the obtained catalyst, 5 parts of oleic acid and 90 parts of deionized water, and then putting the mixture into a planetary ball mill to perform ball milling for 12 hours at a speed of 100r/min to prepare the catalyst coating. Coating polyester glue varnish with adhesive force of grade 1 and drying time of 8h on the surface of the pre-veneered plywood made of birch material by a coating method, wherein the coating amount is 80ml/m2And then dried at 30 ℃ for 10 min. Spraying the prepared catalyst coating onto the bonding layer by using a spray gun, wherein the caliber of the spray gun is 1mm, an air pump is used as an air pressure source, the air pressure is 1Mpa, and the spraying amount is 50ml/m2And then drying at 30 ℃ for 10h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
Through detection, the formaldehyde conversion rate of the plywood in the embodiment can reach 70.86% in 12 hours, and the formaldehyde in the reactor can be completely decomposed in 18 hours.
Example 5:
Au/SiO with 4% Au loading capacity is prepared by adopting an immersion method2The specific method of the catalyst is as follows: according to Au and SiO2The mass ratio of the chloroauric acid solution to the SiO is 4:100, and the quantitative chloroauric acid solution and the SiO are mixed2Mixing and stirring for 30min, drying for 6h under natural conditions, drying for 12h at 110 ℃, roasting for 2h at 400 ℃, and reducing by using sodium borohydride to finally obtain 4% Au/SiO2A catalyst. Mixing 5 parts of the obtained catalyst, 3 parts of polyvinylpyrrolidone and 92 parts of ethanol solution, and then putting the mixture into a planetary ball mill to perform ball milling for 6 hours at a speed of 500r/min to prepare the catalyst coating. Coating anticorrosive wood oil with adhesive force of 1 grade and drying time of 8h on the surface of the smooth plywood made of poplar by a coating method, wherein the coating amount is 50ml/m2And then dried at 30 ℃ for 10 min. By usingSpraying the prepared catalyst coating onto the bonding layer with a spray gun having a caliber of 0.5mm, and air pump as air pressure source with air pressure of 0.4Mpa and spraying amount of 100ml/m2And then drying at 30 ℃ for 12h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
Through detection, the formaldehyde conversion rate of the plywood in the embodiment can reach 62.53% in 5 hours, and the formaldehyde in the reactor can be completely decomposed in 14 hours.
Example 6:
the impregnation method is adopted to prepare Pt/TiO with 0.5 percent of Pt loading capacity2The specific method of the catalyst is as follows: according to Pt with TiO2The mass ratio of the chloroplatinic acid solution to the TiO is 0.5:1002Mixing and stirring for 30min, drying for 6h under natural condition, drying for 12h at 110 deg.C, calcining for 2h at 400 deg.C, and reducing with sodium borohydride to obtain 0.5% Pt/TiO2A catalyst. And mixing the obtained 10 parts of catalyst, 2 parts of polyvinylpyrrolidone and 88 parts of deionized water, and putting the mixture into a planetary ball mill to perform ball milling for 2 hours at a speed of 500r/min to prepare the catalyst coating. Coating polyester ester glue varnish with the adhesive force of grade 1 and the drying time of 8h on the surface of the sanded plywood made of the basswood material by a coating method, wherein the coating amount is 80ml/m2And then dried at 30 ℃ for 10 min. Spraying the prepared catalyst coating onto the bonding layer by using a spray gun, wherein the caliber of the spray gun is 0.5mm, an air pump is used as an air pressure source, the air pressure is 0.5Mpa, and the spraying amount is 200ml/m2And then drying at 30 ℃ for 10h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
Through detection, the conversion rate of formaldehyde in the plywood in the embodiment can reach 30.44% in 5 hours, 62.75% in 13 hours, and formaldehyde in the reactor can be completely decomposed in 19 hours.
Example 7:
Pd/SiO with Pd loading of 3% is prepared by adopting an impregnation method2The specific method of the catalyst is as follows: according to Pd and SiO2The mass ratio of the palladium chloride solution to the SiO is 3:100, and the quantitative ratio of the palladium chloride solution to the SiO is determined2Mixing and stirring for 30min, drying under natural condition for 6 hr, drying at 110 deg.C for 12 hr, calcining at 400 deg.C for 2 hr, reducing with sodium borohydride, and finalTo obtain 3 percent Pd/SiO2A catalyst. Mixing 2 parts of the obtained catalyst, 2 parts of oleic acid and 96 parts of toluene, and then putting the mixture into a planetary ball mill to perform ball milling for 6 hours at the speed of 1000r/min to prepare the catalyst coating. Coating ester glue varnish with adhesive force of grade 1 and drying time of 12h on the surface of the sanded plywood made of basswood by a coating method, wherein the coating amount is 80ml/m2And then dried at 30 ℃ for 20 min. Spraying the prepared catalyst coating onto the bonding layer by a spray gun with the caliber of 0.5mm, using an air pump as an air pressure source, the air pressure being 0.5Mpa, and the spraying amount being 100ml/m2And then drying at 30 ℃ for 10h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
Through detection, the formaldehyde conversion rate of the plywood in the embodiment can reach 48.72% in 12 hours, and the formaldehyde in the reactor can be completely decomposed in 26 hours.
Example 8:
preparation of Pt/SiO with 4% Pt loading capacity by adopting impregnation method2The specific method of the catalyst is as follows: according to Pt and SiO2The mass ratio of the chloroplatinic acid solution to the SiO is 4:100, and the quantitative chloroplatinic acid solution and the SiO are mixed2Mixing and stirring for 30min, drying for 6h under natural condition, drying for 12h at 110 ℃, roasting for 2h at 400 ℃, and reducing by using sodium borohydride to finally obtain 4% Pt/SiO2A catalyst. Mixing 2 parts of the obtained catalyst, 2 parts of polyvinylpyrrolidone and 96 parts of deionized water, and then putting the mixture into a planetary ball mill to perform ball milling for 12 hours at a speed of 500r/min to prepare the catalyst coating. Coating anticorrosive wood oil with adhesive force of 1 grade and drying time of 8h on the surface of the smooth plywood made of poplar by a coating method, wherein the coating amount is 50ml/m2And then dried at 30 ℃ for 10 min. Spraying the prepared catalyst coating onto the bonding layer by a spray gun with the caliber of 0.5mm, using an air pump as an air pressure source, the air pressure being 0.4Mpa, and the spraying amount being 80ml/m2And then drying at 30 ℃ for 12h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
Through detection, the formaldehyde conversion rate of the plywood in the embodiment can reach 55.98% in 12 hours, and the formaldehyde in the reactor can be completely decomposed in 25 hours.
Example 9
Preparation of Pt/TiO with 2% Pt loading by adopting impregnation method2The specific method of the catalyst is as follows: according to Pt with TiO2The mass ratio of the chloroplatinic acid solution to the TiO is 2:1002Mixing and stirring for 30min, drying for 6h under natural condition, drying for 12h at 110 ℃, roasting for 2h at 400 ℃, and reducing by using sodium borohydride to finally obtain 2% Pt/TiO2A catalyst. And mixing 3 parts of the obtained catalyst, 3 parts of polyvinylpyrrolidone and 94 parts of ethanol, and then putting the mixture into a planetary ball mill to perform ball milling for 12 hours at a speed of 500r/min to prepare the catalyst coating. Coating polyester ester glue varnish with the adhesive force of grade 1 and the drying time of 8h on the surface of the scratch plywood made of poplar materials by a coating method, wherein the coating amount is 80ml/m2And then dried at 30 ℃ for 10 min. Spraying the prepared catalyst coating onto the bonding layer by a spray gun with the caliber of 0.3mm, using an air pump as an air pressure source, the air pressure being 0.4Mpa, and the spraying amount being 100ml/m2And then drying at 30 ℃ for 12h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
Through detection, the formaldehyde conversion rate of the plywood in the embodiment can reach 46.61% in 12 hours, and the formaldehyde in the reactor can be completely decomposed in 28 hours.
Example 10
Au/SiO with 6% Au loading capacity is prepared by adopting an immersion method2The specific method of the catalyst is as follows: according to Au and SiO2The mass ratio of the chloroauric acid solution to the SiO is 6:100, and the quantitative chloroauric acid solution and the SiO are mixed2Mixing and stirring for 30min, drying for 6h under natural conditions, drying for 12h at 110 ℃, roasting for 2h at 400 ℃, and reducing by using sodium borohydride to finally obtain 6% Au/SiO2A catalyst. Mixing 2 parts of the obtained catalyst, 3 parts of oleic acid and 95 parts of deionized water, and then putting the mixture into a planetary ball mill to perform ball milling for 12 hours at a speed of 100r/min to prepare the catalyst coating. Coating polyester ester glue varnish with adhesive force of grade 1 and drying time of 8h on the surface of the birch material veneer by a coating method, wherein the coating amount is 100ml/m2And then dried at 30 ℃ for 20 min. Spraying the prepared catalyst coating onto the bonding layer by using a spray gun, wherein the caliber of the spray gun is 1mm, an air pump is used as an air pressure source, the air pressure is 1Mpa, and the spraying amount is80ml/m2And then drying at 30 ℃ for 10h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
Through detection, the formaldehyde conversion rate of the plywood in the embodiment can reach 55.84% in 12 hours, and the formaldehyde in the reactor can be completely decomposed in 24 hours.
Comparative sample 1
Cu/SiO with Cu loading of 6% is prepared by adopting an immersion method2The specific method of the catalyst is as follows: according to Au and SiO2The mass ratio of the copper nitrate solution to the SiO is 6:100, and the copper nitrate solution and the SiO are quantitatively added2Mixing and stirring for 30min, drying for 6h under natural condition, drying for 12h at 110 ℃, roasting for 2h at 400 ℃, and reducing by using sodium borohydride to finally obtain 6% Cu/SiO2A catalyst. Mixing 2 parts of the obtained catalyst, 3 parts of oleic acid and 95 parts of deionized water, and then putting the mixture into a planetary ball mill to perform ball milling for 12 hours at a speed of 100r/min to prepare the catalyst coating. Coating polyester ester glue varnish with adhesive force of grade 1 and drying time of 8h on the surface of the birch material veneer by a coating method, wherein the coating amount is 100ml/m2And then dried at 30 ℃ for 10 min. Spraying the prepared catalyst coating onto the bonding layer by using a spray gun, wherein the caliber of the spray gun is 1mm, an air pump is used as an air pressure source, the air pressure is 1Mpa, and the spraying amount is 80ml/m2And then drying at 30 ℃ for 10h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
The plywood in the embodiment has almost no effect of catalyzing and decomposing formaldehyde, and the concentration of the formaldehyde is almost unchanged at 48 hours.
Comparative sample 2
Preparation of Pt/SiO with 2% Pt loading capacity by adopting impregnation method2The specific method of the catalyst is as follows: according to Pt and SiO2The mass ratio of the chloroplatinic acid solution to the SiO is 2:100, and the quantitative chloroplatinic acid solution and the SiO are mixed2Mixing and stirring for 30min, drying for 6h under natural condition, drying for 12h at 110 ℃, roasting for 2h at 400 ℃, and reducing by using sodium borohydride to finally obtain 2% Pt/SiO2A catalyst. 3 parts of the obtained catalyst, 2 parts of hexadecyl trimethyl ammonium bromide and 95 parts of toluene solution are mixed and then put into a planetary ball mill to be ball-milled for 12 hours at 200r/min, so as to prepare the catalyst coating. By coatingCoating alkyd varnish with adhesive force of grade 1 and drying time of 4h on the surface of the elm material faced plywood, wherein the coating amount is 80ml/m2And then dried at 30 ℃ for 60 min. Spraying the prepared catalyst coating onto the bonding layer by a spray gun with the caliber of 0.2mm, using an air pump as an air pressure source, the air pressure being 0.5Mpa, and the spraying amount being 100ml/m2And then drying at 30 ℃ for 10h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
The test proves that the conversion rate of the plywood in the embodiment is only 8.39% in 12 hours and only 13.25% in 48 hours, and the adhesion and immobilization capacity of the plywood to the catalyst layer is greatly reduced due to long drying time of the varnish layer.
Comparative sample 3
Preparation of Pt/TiO with 2% Pt loading by adopting impregnation method2The specific method of the catalyst is as follows: according to Pt with TiO2The mass ratio of the chloroplatinic acid solution to the TiO is 2:1002Mixing and stirring for 30min, drying for 6h under natural condition, drying for 12h at 110 ℃, roasting for 2h at 400 ℃, and reducing by using sodium borohydride to finally obtain 2% Pt/TiO2A catalyst. And mixing the obtained 4 parts of catalyst, 2 parts of silane coupling agent and 94 parts of deionized water, and then putting the mixture into a planetary ball mill to perform ball milling for 2 hours at a speed of 500r/min to prepare the catalyst coating. Spraying the prepared catalyst coating onto the bonding layer by a spray gun with the caliber of 0.5mm, using an air pump as an air pressure source, the air pressure being 0.5Mpa, and the spraying amount being 100ml/m2And then drying at 30 ℃ for 10h to obtain the formaldehyde catalytic decomposition coating based on the plywood.
Through detection, the conversion rate of the plywood in the embodiment can reach 38.69% in 12 hours, and the conversion rate is only 65.14% in 24 hours. But because the plywood is not coated with the bonding layer, the catalytic layer is not firmly supported and falls off in the using process.
Comparative sample 4
Compared with a catalytic oxidation method, the adsorption method is a widely used method for removing formaldehyde at present, and experiments are carried out by using commercially available activated carbon (JEC), wherein the specific surface area of the activated carbon is 1178cm-1(g) pretreating the activated carbon and removingSoaking in water for 4h to remove surface impurities, drying at 120 deg.C for 12h, grinding, sieving, and controlling particle size to 250-350 um. 0.02g of the above activated carbon was placed in a reactor, and its formaldehyde-removing property was examined.
According to detection, the removal rate of formaldehyde is 56.32% at 2h, 70.36% at 5h and 72.85% at 12 h. The formaldehyde removal rate is only improved by 2.49% from 5h to 12h, and presumably the activated carbon reaches an adsorption saturation value, and the activated carbon cannot continuously adsorb formaldehyde after reaching the saturation value, and even can be desorbed due to competitive adsorption of other substances in the air such as water and the like, so that formaldehyde is released indoors.
Comparative sample 5
Compared with the example 1, no sodium hexametaphosphate is added in the ball milling process.
Through detection, the conversion rate of the plywood in the embodiment can reach 49.69% in 12 hours, and the conversion rate is only 76.14% in 24 hours.

Claims (9)

1. The utility model provides a plywood with formaldehyde room temperature catalytic decomposition function which characterized in that: the catalyst consists of two parts, namely a noble metal active component and a catalyst carrier, wherein the loading amount of the active component is 0.5-6%.
2. The plywood with formaldehyde room temperature catalytic decomposition function of claim 1, wherein: the plywood is one of sand light plywood, scraping plywood, wainscot plywood, veneer plywood in advance, the material of plywood is one of basswood, birch, poplar, elm.
3. The plywood with formaldehyde room temperature catalytic decomposition function of claim 1, wherein: the adhesive layer is one or more of ester glue varnish, shellac varnish, alkyd varnish, polyester ester glue varnish and anticorrosive wood oil, the adhesive force of the adhesive layer is grade 1, and the drying time is 2-12 h.
4. The plywood with formaldehyde room temperature catalytic decomposition function of claim 4, wherein: the active component of the catalyst is one or a mixture of more than two of Pd, Pt and Au.
5. The plywood with formaldehyde room temperature catalytic decomposition function of claim 4, wherein: the carrier of the catalyst is SiO2、TiO2、Al2O3One or a mixture of two or more of them.
6. The method for preparing the plywood with the formaldehyde room-temperature catalytic decomposition function according to claim 1, which is characterized by comprising the following steps:
(1) putting the catalyst powder into a ball mill, adding a certain amount of solvent and auxiliary agent, wherein the rotating speed of the ball mill is 100-1000r/min, and the ball milling time is 2-12h to prepare the catalyst coating;
(2) coating the adhesive layer on the surface of the plywood carrier by a coating brush for 1-5 times, wherein the coating amount is 50-100ml/m2Then drying for 5-20min at 30 ℃;
(3) spraying the catalyst coating onto the adhesive layer with a spray gun with a diameter of 0.2-2mm, and air pump as air pressure source with air pressure of 0.2-1Mpa and spraying amount of 50-200mL/m2And then drying for 6-12h at 30 ℃.
7. The method for preparing plywood with formaldehyde room temperature catalytic decomposition function according to claim 6, wherein the solvent is one or a mixture of more than two of water, ethanol and toluene.
8. The method for preparing plywood with formaldehyde room temperature catalytic decomposition function as claimed in claim 6, wherein the auxiliary agent is one or a mixture of more than two of sodium dodecyl benzene sulfonate, sodium hexametaphosphate, cetyl trimethyl ammonium bromide, oleic acid, polyvinylpyrrolidone and silane coupling agent.
9. The method for preparing the plywood with the formaldehyde room-temperature catalytic decomposition function according to claim 6, wherein the mass ratio of the catalyst, the auxiliary agent and the solvent in the catalyst coating is 2-10: 1-5: 85-97.
CN202011224093.8A 2020-11-05 2020-11-05 Plywood with formaldehyde room-temperature catalytic decomposition function and preparation method thereof Pending CN112356176A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011224093.8A CN112356176A (en) 2020-11-05 2020-11-05 Plywood with formaldehyde room-temperature catalytic decomposition function and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011224093.8A CN112356176A (en) 2020-11-05 2020-11-05 Plywood with formaldehyde room-temperature catalytic decomposition function and preparation method thereof

Publications (1)

Publication Number Publication Date
CN112356176A true CN112356176A (en) 2021-02-12

Family

ID=74508740

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011224093.8A Pending CN112356176A (en) 2020-11-05 2020-11-05 Plywood with formaldehyde room-temperature catalytic decomposition function and preparation method thereof

Country Status (1)

Country Link
CN (1) CN112356176A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116039207A (en) * 2022-11-07 2023-05-02 桐乡市前沿新材料研究院 Environment-friendly decorative wallboard with self-purification function and preparation process thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1364659A (en) * 2001-01-12 2002-08-21 中国科学院化学研究所 Nanometer optical catalyst mother solution and its preparing method and use
CN1443605A (en) * 1993-12-10 2003-09-24 东陶机器株式会社 Multifunctional material with optical catalytic function and its mfg. method
CN1888311A (en) * 2005-06-29 2007-01-03 上商株式会社 Wall material with zeolite layer at surface and wall material adhered with porous substance layer on surface
CN101380574A (en) * 2007-09-06 2009-03-11 中国科学院生态环境研究中心 Catalyst for fully oxidizing formaldehyde at room temperature
CN105349029A (en) * 2015-12-01 2016-02-24 长沙豪威建材科技有限公司 Stone protecting agent with air purifying function and preparation method and application
CN109012756A (en) * 2018-09-17 2018-12-18 南京景铄新材料科技有限公司 A kind of catalysis material and preparation method thereof with high stability
US20190177587A1 (en) * 2016-08-31 2019-06-13 3M Innovative Properties Company Halogen and polyhalide mediated phenolic polymerization
CN110653895A (en) * 2019-10-17 2020-01-07 湖南乔伟生态科技新材料有限公司 Negative oxygen ion ecological plate and manufacturing method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1443605A (en) * 1993-12-10 2003-09-24 东陶机器株式会社 Multifunctional material with optical catalytic function and its mfg. method
CN1364659A (en) * 2001-01-12 2002-08-21 中国科学院化学研究所 Nanometer optical catalyst mother solution and its preparing method and use
CN1888311A (en) * 2005-06-29 2007-01-03 上商株式会社 Wall material with zeolite layer at surface and wall material adhered with porous substance layer on surface
CN101380574A (en) * 2007-09-06 2009-03-11 中国科学院生态环境研究中心 Catalyst for fully oxidizing formaldehyde at room temperature
CN105349029A (en) * 2015-12-01 2016-02-24 长沙豪威建材科技有限公司 Stone protecting agent with air purifying function and preparation method and application
US20190177587A1 (en) * 2016-08-31 2019-06-13 3M Innovative Properties Company Halogen and polyhalide mediated phenolic polymerization
CN109012756A (en) * 2018-09-17 2018-12-18 南京景铄新材料科技有限公司 A kind of catalysis material and preparation method thereof with high stability
CN110653895A (en) * 2019-10-17 2020-01-07 湖南乔伟生态科技新材料有限公司 Negative oxygen ion ecological plate and manufacturing method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
汪多仁: "《绿色化工助剂》", 31 January 2006, 科学技术文献出版 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116039207A (en) * 2022-11-07 2023-05-02 桐乡市前沿新材料研究院 Environment-friendly decorative wallboard with self-purification function and preparation process thereof

Similar Documents

Publication Publication Date Title
CN110975866B (en) Preparation method of noble metal and nonmetal nano titanium dioxide loaded, photocatalyst water-based paint and preparation method thereof
CN108325536B (en) Manganese-copper-based composite oxide doped rare earth element catalyst for catalyzing VOCs (volatile organic compounds), and preparation method and application thereof
CN103357409B (en) A kind of room temperature composite noble metal alloy formaldehyde through catalytic oxidation agent and preparation method thereof
CN104174395B (en) The rare earth modified carried noble metal integer catalyzer of eliminating formaldehyde at room temperature preparation method
CN106964348B (en) A kind of formaldehyde pollutants room temperature catalytic oxidation catalyst and its preparation method and application
US20200269216A1 (en) Nano-catalyst composite for decomposing formaldehyde at room temperature and preparation method thereof
CN106824256B (en) Formaldehyde degradation catalyst and preparation method thereof
CN102836712A (en) Catalyst for completely removing formaldehyde in indoor air at room temperature
CN101757902A (en) Method for preparing composite photocatalyst containing activated carbon coating
CN103769074A (en) Catalytic combustion catalyst and preparing method thereof
CN107983320B (en) Preparation method of bifunctional film for removing formaldehyde, product and application thereof
CN107143906A (en) Electric heating device capable of purifying air and the preparation method of safety glass supported catalyst
CN112356176A (en) Plywood with formaldehyde room-temperature catalytic decomposition function and preparation method thereof
CN102240549A (en) Catalysis technique for high-efficiency, moisture-resistance and room-temperature formaldehyde removal
CN1293938C (en) Methanal disintegrant and preparation thereof
CN114130387B (en) Nitrogen defect g-C3N4Surface doped nano manganese catalyst and preparation method and application thereof
CN107243321A (en) A kind of air cleaning material of long-acting removal organic polluter
CN113617202A (en) Composite organic gas pollutant purifying agent with infrared thermal effect and preparation method thereof
CN110882699B (en) Photocatalyst based on triple heterojunction structure and preparation method thereof
CN106475128A (en) A kind of preparation method of industrial waste gas purifying catalyst
CN108912887B (en) Diatom ooze coating capable of degrading formaldehyde and used for interior decoration
CN108201889A (en) It is a kind of using porous ceramics as the photocatalyst air purifying material of carrier
CN110433868A (en) A kind of aerogel composite and preparation method thereof for formaldehyde catalytic decomposition
CN116212853A (en) δ-MnO2 catalytic material and its preparation method and its application in the preparation of degradable formaldehyde filter
CN102836735A (en) Micro/mesoporous manganese molecular sieve loading high-efficiency formaldehyde removal catalyst

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination